From commit log https://github.com/wurikiji/iohook/commit/3d06e5763ef9cb932b0b83b56a180170c7ea75fc, keyboard propagation is added. But on Linux x11 environment, libuiohook does not support keyboard propagation.
From commit log 3d06e57, keyboard propagation is added.
But on Linux x11 environment, libuiohook does not support keyboard propagation.